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An integer is chosen at random from 1 to one million. What is the probability it contains the digit 7 at least once?

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Make a market two points wide on the probability that a randomly chosen integer from 1 to 100 does not contain the digit 7.A two-digit number is chosen at random (10 to 99). What is the probability its ones digit is greater than its tens digit?How many of the integers from 1 up to one billion contain the digit 7?

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